GPU fans setting isn't on the BIOS, mind. It's on the driver (Crimson, Adrenaline, whatever the name now), and/or MSI Afterburner. On the driver side, you might want to set all settings to manual to better control the fan speed. MSI Afterburner similarly requires checking the "use user fan curve" setting or something similar to it.
Make sure to keep an eye on temps after reducing the fans speed, just to be safe. At stock, the card will limit itself to a safe temp about 82-83 degrees C, so if you want to be thorough also keep an eye on power usage and clockspeed.
GPU temps can also be helped somewhat with optimized case airfow; you want a good 120mm exhaust fan, and if your case has side fan mounting, experiment with it to see which configuration yields better temps. Side mount can be either beneficial or just added noise, depending on your case airflow. If flow is good, then side fans do nothing at all.
If your PC case have a reusable PCI slot cover on the back, you can also experiment if removing the covers help. It used to help GPU temps when PC cases use a solid cover, not so much these days with slotted covers. In my experiment, if you already have slotted PCI slot covers don't remove them. I see no improvement in temps doing so and just put them back on so I won't lose the covers.
Repasting the GPU is also good advice, personally I would add to that advice by monitoring GPU temps every now and then. I see slight degradation with KPx thermal paste after 3 months, and der8auer mentions Kryonaut on GPUs are to be replaced in yearly interval. OEM stuff isn't the best performing, but they tend to last longer than aftermarket pastes.
If that's still not enough, there's always the aftermarket cooling solution path. But that's costly and I find to be harder to procure than CPU cooling solutions.
TL;DR: use AMD driver or MSI Afterburner for fan control, check your case airflow, experiment with PCI slot cover unless you have slotted ones, and repaste every once a year.